On April 11 and 12 the Ukrainian Olympiad in Informatics 2023 took place. Because of the war, the Olympiad took place in the regional centers of Ukraine and in Warsaw.

The problems were created by RomaWhite, BigBag, Barichek, antontrygubO_o, I_LOVE_DASHA_KARPENKO, Denisov, VladProg, Grogu, TheScrasse, bortoz, Kaey, andr1y

The mirror will take place on April 15 and 16. It will start at 11 AM Kyiv time. You can choose any 5-hour window to participate. The problems will be available in Ukrainian and English. Everyone is welcome to participate (except for the participants from the terrorist state).

The link to the first round: uoi2023-1.eolymp.io

The link to the second round: uoi2023-2.eolymp.io

The results of the mirror contest are available here. The original results are available here.

• 7 days ago, # ^ | It was Russia which invaded Ukraine, wasn't it?

  • 7 days ago, # ^ | ← Rev. 2 →   +94 Vast majority of russians at Codeforces do not support the war.

    • 6 days ago, # ^ | First of all it isn't place to discuss politics, people should not hate each other just because of different views, everyone can be mistaken and be exposed to propaganda

      • 6 days ago, # ^ | Different views as rockets flying into your house?

• 7 days ago, # ^ | ← Rev. 2 →   -43 Дружок-пирожок, не надо тут начинать апартеид Любые ограничения по цвету штанов должны были остаться в прошлом веке

  • 2 days ago, # ^ | Like wars ?

    • 2 days ago, # ^ | Like wars.

• 7 days ago, # ^ | Use VPN maybe

• 7 days ago, # ^ | Do not embarrass yourself. We are already had lost our honor.

  • 22 hours ago, # ^ | you lost the blue color :&

• • 6 days ago, # ^ | Nice to meet you, clown. How are you?

    • 5 days ago, # ^ | You are still a clown.

• 7 days ago, # ^ | Um, like every time somebody creates a list of WF teams and puts Taiwan in the "Country" column, there are dozens of comments from Chinese accounts that say that Taiwan is an inseparable part of China? Are you talking to them now?

  • 6 days ago, # ^ | They shouldn't either

    • 6 days ago, # ^ | you are cyan

      • 6 days ago, # ^ | you are grey

  • 6 days ago, # ^ | ← Rev. 5 →   -25 It's my first time support user: Raito_Yagami ]

  • 6 days ago, # ^ | tbh , no one in asia is supporting ukraine.

    • 6 days ago, # ^ | War is awful, as a russian I do not support my country in this war. Every day of war is a loss for the whole world.

      • 6 days ago, # ^ | russian who changed Australia to Antarctica in profile? only Zelenskyy can stop this war

        • 6 days ago, # ^ | ← Rev. 2 →   +19 I'm ashamed of my country. That is why I set a random country in my profile (except Russia or Ukraine)

          • 6 days ago, # ^ | You aren't supporting your own country, won't you be classified as a traitor. Russia would win iff their citizens are supporting their country.

            • 6 days ago, # ^ | ← Rev. 3 →   +51 Hundreds of people are dying every day. Millions of ukrainians left their country, around million russians left Russia. Half of Ukraine is destroyed. Believe me, it is unfair war. Why should I support it? It is not a football match to support your team.

            • 6 days ago, # ^ | I will choose being a traitor to the corrupt government of the country I was born in by chance over committing horrible crimes against humanity any day.

        • 6 days ago, # ^ | Are you joking? Like Zelenskyy should let Russians come to Ukraine and take it?

• 7 days ago, # ^ | I understand, say, fighting with armed soldiers, but what did 15-16yo Ukrainian kids do to russian army? Throwing away parallels and returning back to your question: it's not about kids — it's more like a signal for a whole country that something, khm-khm, lets say, is off. I believe there are many decent people among Russian athletes and chess players who condemn war, but if they will be allowed to participate in international events under russian flag — it will be much easier for putin's propaganda to show to the average russians that everything is fine and they shouldn't worry much about the war.

  • 7 days ago, # ^ | yeah, better to sow the idea in the young generation that we are not friends

    • 6 days ago, # ^ | Oh, so apart from that they have all the reasons to think that we are? Is that what your media tells to people? I doubt so.

  • 6 days ago, # ^ | Russia is an amazing country and our BRICS partners. As for propaganda every country has it.

• 2 days ago, # ^ | russia could simply not start the war

• 7 days ago, # ^ | ← Rev. 2 →   +71 Like Bruce Willis in Die Hard

• 7 days ago, # ^ | Imagine having written a pro-russian comment on russian cp website and still getting a lot of dislikes

  • 6 days ago, # ^ | UA bots got here with their olympiads' announcements and pro-ukrainian likes

    • 6 days ago, # ^ | Written from unrated account created 3 months ago.

      • 6 days ago, # ^ | Written from a still blue account created 8 years ago LOL. I have unofficial submissions of tricky problems in turn https://codeforces.com/submissions/Dinanath94 no time for contests

        • 6 days ago, # ^ | Written from a still blue account created 8 years ago LOL My comment wasn't about skill at all, but that the only possible bots there are the guys like you. If you didn't get that — blue is something you wouldn't reach even in 8 years. I have unofficial submissions of tricky problems Yeah, this one indeed was tricky. no time for contests Understandable, commenting here is so time consuming.

          • 6 days ago, # ^ | Solve 373, 227, 229 and so on before saying "you wouldn't reach even in 8 years". Don't hold on 100.

    • 6 days ago, # ^ | You should start thinking about why there are a lot of pro-ukrainian likes and pro-russian dislikes.

      • 6 days ago, # ^ | Cause this site is visited from Eastern Europe mainly where russophobia flourishes. Here in India, maybe in Latin America and other distant states people are unbiased. Moreover I suppose many russians don't endorse their leader.

        • 6 days ago, # ^ | You will be surprised, but some people have their own opinions and do not divide the world into "Us vs. Them" or "Friends vs. Enemies". You can have such views in a strategy game. But actual humans are not just resources that their government can use and throw away. You mustn't say "I want that land, so I will kill half of the people who live there so that the other half will agree that I own them". You don't have to define yourself based on a piece of land you were born on and on who issued your documents. You can be just a human being, and try to be a good human being, instead of being "a good Indian".

          • 5 days ago, # ^ | Actually you are always representing something. When in institution/company you represent your home, when in country you represent your institution/company, when outside your country you represent your country. You can only represent humanity when aliens/monsters arrive. One might say here that some humans are monsters, in my opinion yes, but who made those monsters? the community of humanity did. As long as there are humans there will be war. For the purpose of greed, wealth and superiority. Your land is everything you have. If you go in a foreign country, you know nobody and nobody knows you. Everything different and strange, races, languages, accents, food, religion. Btw, Short Story idea: From this moment, Nationalism died and humanity lived. World became World and not USA, Russia, China... This revolution after Sir Um_nik posted this comment. We all owe him for the crisis that happened afterwards. I just typed whatever came to my mind, sorry if you think you wasted your time reading this comment. (I don't think you did).

            • 5 days ago, # ^ | Yes, you can say that you always represent something. But the ways people represent the same thing can be very different. From my personal case: I am Romanian, but I do not feel proud about this or find being Romanian a truly important thing, even though, like all other countries, my country also has a nationalist community. I did not choose to be born in Romania, I do not really like the country, and I do not feel attached to Romanian culture or traditions. Even though I feel some sort of vague connection to Romania (and this became even clearer since I went abroad), I wouldn't say that my nationality is an important part of my identity. You could only say that I represent Romania from the perspective of the person who does not really care about being Romanian. And wait, I actually come from a relatively prosperous country (for Eastern Europe standards) which has not started an atrocious war, so think about the opinions pacifist Russian people have about their country. I find it thus reasonable to identify as a "good human" rather than a "good Russian/European/whatever".

        • 6 days ago, # ^ | Check the number of users from India and China and compare it to any country of Eastern Europe. What about "Here in India people are unbiased" — are you saying that everyone in India has the same opinion? Does it really means "unbiased"?

          • 5 days ago, # ^ | ← Rev. 2 →   -8 yeah , everyone in india has almost the same opinion , i.e support to russia. Maybe because of the popularity of putin in shorts and reels depicting him as a goat or the help russia did and is doing to india.

• 7 days ago, # ^ | imagine bombing civilians

  • 5 days ago, # ^ | ← Rev. 2 →   -33 Who else to bomb? Bombs were created solely for this purpose. (And not to destroy big meteors which mighttt come to the Earth). No offense to anyone #be_humble #be_nice.

• 2 days ago, # ^ | There were no ukrainians at IOI2016(held in russia)

  • 22 hours ago, # ^ | idk but maybe because of the results

    • 20 hours ago, # ^ | Ukraine did not participate in these events due to the war that started back in 2014

      • 37 minutes ago, # ^ | It seems it wasn't a russian ban but an ukrainian withdrawal https://codeforces.com/blog/entry/46512 That's the difference

        • 22 minutes ago, # ^ | And that's exactly what he wants to say, since you ask them to "ban yourself."

          • 10 minutes ago, # ^ | They banned themselves in 2016 that is better than claiming someone else be banned. Pls look at topic starter's handle. Imho there's no reason for ban

• 6 days ago, # ^ | invader is invader I just want to say and IOI must be act equal to all countries

• 5 days ago, # ^ | and inappropriate text about a "terrorist state". codeforces is not a politics discussion site.

• 5 days ago, # ^ | What's wrong with "Azov Brigade", and why should we have other countries?

• 45 hours ago, # ^ | Heroyam slava! Yes. We are translating the editorial to English. Will publish it today or tomorrow.